Furnace for heating fluids



Sgpt. 9, 1952 E. R. KILSBY 2,609,814

FURNACE FOR HEATING FLUIDS F 'iled Julyl3, 1945 s Sheets-Sheet 2- 2/ INVENTOR EDWARD E. A745 ATTORNEY P 1952 E. R. KILSBY FURNACE FOR HEATING FLUIDS 3 Sheets-Sfieet 3 Filed July 13, 1945 sla Z Patented Sept. 9, 1952 FURNACE FOR HEATING FLUIDS Edward R. Kilsby, Newark, N. J., assignor to Foster-Wheeler Corporation, New York, N. Y.,a

corporation of New York Application July 13, 1945, Serial No. 604,778

9 Claims. (01. 125 -109) This invention relates to furnaces and more particularly to furnaces for heating fluids.

The present invention provides a furnace in which the products of combustion are so directed into heat exchange relationship with tubular members that the maximum amount of heat is transferred from said products to the tubular members prior to passage of the combustion products from the furnace.

The-invention will be understood from the following description when considered in connection with the accompanying drawings forming a part thereof and in which:

Fig. 1 is a vertical sectional view of the furnace of the present invention;

Fig. 2 is a transverse sectional view taken on the line 22 of Fig. 1;

Fig. 3 is a partial vertical sectional view of another embodiment of the invention;

Fig. 4 is a partial vertical sectional view of another embodiment of the invention; and

Fig. 5 is a transverse sectional view taken on the line 55 of Fig. 4.

Like characters of reference refer to like parts throughout the views.

Referring to Figs. 1 and 2 of the drawings, the

furnace of the present invention, as shown, iscylindrically shaped and comprises a setting Ill having a metallic outer casing II which is lined with a refractory wall |2 forming a combustion chamber IS. The roof IA of the'furnace is frustoconical shaped and has a combustion gas outlet opening [5 in the central portion thereof, the opening being in communication with a stack l 6. Gas outlet opening I5 is controlled by a damper H. The setting has a floor 18 comprising a metal sheet I9 lined on the furnace chamber side thereof with refractory 20. A burner 2 I, mounted in the central portion of the floor l8, has a burner outlet opening 22 which directs the products of combustion upwardly into the furnace chamber l3. Wall |2 of the furnace chamber has a refractory lining 23 in the lower part of the furnace which lower part of the furnace has a peep hole 24 and also a door 25 closing an opening therein. A cylindrical coil of tubular members 26, the convolutions of which are spaced from one another, is positioned in the upper part of the furnace, the center of the coil being in substantial vertical alignment with the gas outlet opening. The coil of tubular members 26 is slightly less in diameter than the diameter of the chamber l3 and has an inlet connection 21 at one end thereof and an outlet connection 28 at the opposite end. The coil, as shown, is supported by a coil supporting member 29 secured in the Wall I2.

A plurality of spaced directing members or piers 33, preferably of refractory material, are positioned in a circle around the burner opening 22 in the lower portion of the furnace and beneath the coil of tubular members 26. The members 33 extend radially of the burner 2| from apoint adjacent the burner opening 22 to a point adjacent the inner periphery 3| of the lining 23. The directing members rest on the bottom 18 of the furnace and extend upwardly to a point adjacent the bottom of the coil of tubular members 26. Adjacent the inner periphery 3| of the lining 23 the directing members 30 are wider than they are adjacent the burner opening 22 and, therefore, taper from adjacent the periphery 3| to adjacent the burner opening 22. The directing members 30 each have a support 32 positioned at the top thereof upon which support rests a baliie or impingement plate 33. The plate 33 is of such dimension that the gases from the burner 22 will impinge thereon and of such dimension as to direct the said gases to flow horizontally through the spaces 34 between adjacent piers thereafter to pass into heat exchange relationship with the tubular members 26 of the coil adjacent the periphery of the coil. f

In operation, gases of combustion from the burner 2| pass upwardly from the burner and impinge upon the baffie 33 which causes the gases to be directed outwardlyfrom beneath the baflle into the spaces 34 between the directing members to flow substantially horizontally between said members 30. Gases flowing from the spaces 34 pass upwardly and in heat exchange relationship with the tubular members 26 of the coil adjacent the periphery of said coil. As the gases flow upwardly, they pass toward the center of the chamber I3 to flow outwardly of the furnace through the gas outlet opening 15. The gases of combustion, therefore, in rising become distributed throughout the areaof the coil providing substantially equal heating of the coil. The burner 2| may be snuffed out bythe introduction of steam through the conduit 35.

The form of the invention shown in Fig. 3 is somewhat similar to the form shown in Figs. 1 and 2. In the form of the invention disclosed in Fig. 3, directing members or piers 35 are composed of a plurality of refractory tiles 31 instead of being of solid refractory as are directing members 30. The operation of the embodiments disclosed in the various views are the same.

While preferred embodiments of the invention have been disclosed, it should be understood that the present invention is capable of use with other constructions. For example, the piers or directing members 39 or 36 may extend upwardly and inside the coil of tubular members 26 so that the gases will pass outwardly from the spaces 34 into heat exchange relationship with the tubular members.

Since changes may be effected in the form of the invention selected for disclosure without departing from the principles of the invention, it will be understood that the invention is not to be limited excepting by the scope of the appended claims.

What is claimed is: a

1. A furnace comprising a settin with a combustion chamber therein, burner means positioned adjacent the bottom of the combustion chamber and so as to di ect a stream of products of combustion substantially vertically upwardly intosaid chamber, a plurality of spaced directing members arranged around the burner means -.so as to form a passage for said stream extending substantially parallel thereto and to provide spaces between adjacent members, the directing i members and also the spaces therebetween extending from an inner extremity adjacent said the products from the passage through the spaces i between-the directing members in a generally horizontal direction, and tubularmeans positioned in said chamber at a higher level than saidimpingement member and above and in substantial vertical alignment with that portion of the spaces between said point and outer extremity, the combustion chamber having a gas outlet opening positioned beyond the tubular means in the direction of flow of the gases of combostion from the burner whereby the gases flow from said portion of the spaces to said gas outlet opening in a generally vertical direction and in heat exchange relationship with said tubular means.

2. A furnace comprising a setting with a combustion chamber therein, a tubular coil in said chamber of a diameter less than the transverse dimension of the combustion chamber, the coil being disposed so that the diameter thereof extends transversely of the combustion chamber, burner means positioned adjacent the bottom of the combustion chamber and so as to direct a stream of products of combustion substantially vertically upwardly into said chamber, a plurality of spaced directing members arranged around the burner means so-as-to form a passage for said stream of products extending substantially parallel thereto and to provide spaces between adjacent members, the directing members and also the spaces therebetween being disposed in the combustion chamber beneath said coil and extending from an inner extremity adjacent said passage to an outer extremity adjacentthe inner periphery of the combustion chamber, and an impingement member positioned in the combustion chamber at a level lower than said coil and above the burner means and extendingtrans- .of the gases of combustion from the burner whereby the gases iiow from said portion of the spaces to said gas outlet opening in a generally vertical directicn and in heat exchange relationshipwithsaid-tubular coil.

3. A vfurn ce comprising a setting with a combustion chamber therein, a tubular coil in said chamber of a diameter less than the transverse dimension of the combustion chamber, the coil being disposed so that the diameter thereof extends transversely of the combustion chamber, burner means positioned adjacent the bottom of the combustion chamber and in substantial verticalalignment with the longitudinal axis of the coil, said burner being so disposed as to direct a stream of products oi combustion substantially vertically upwardly into said chamber, a plurality of vertically disposed ga directingmembers arranged around the burner means to form a vertically extending gas passage for the products of combustion therefrom, said directingmembers being spacedfrom one another to form gas spaces between adjacent members which spaces extend parallel to and radially outwardly rom said passage, the directing members and also the spaces therebetween beingdisposed in the combustion chamber beneath said coil and extending from an inner extremity adjacent said passage to, an outer extremity adjacent the inner periphery .Of'tl'l combustion chamber and an impingement member positioned in the combus tion chamber at a level lower than said coil and above the burner means and extending transversely of the path of flow of said products flowing through the passage, said impingement member extending over the passage and said spaces to a point short of the outer extremity of the spaces thereby directing said products from the passage through the'spaces between the directing members in a generally horizontal :direction,ithe tubular coil being disposed insubstantial vertical alignment with that portion of the spaces between said point and the outer extremity and in spaced relationship with the inner periphery of the combustion chamber, the combustion chamber having a gas outlet .openingfpositioned substantially'centrally of said coil'to receive prod- .ucts of combustion after they flow from the portion of the spaces out vardly of said section thereof and. in heat exchange relationship with said tubular coil;

4. A furnace comprising a setting with acombustion chamber therein, burner means positioned adjacent-the bottom of said chamber and so as to direct a stream of products of combustion substantially vertically upwardly into said chamber, a plurality of spaced directing members extending into the chamber and arranged around the burner means so as to form a passage forsaid stream extending substantially parallel thereto and to provide spaces betwen adjacent members, the directing members and also the spaces therebetweenextending froman innor extremity adjacent said passage to an outer extremity adjacent the, inner periphery of the combustion chamber, an impingement member mounted on the directing members and positioned in the path of flow of said products flowing through the passage, said impingement member extending over the passage and said spaces to a point short of the outer extremity of the spaces thereby directing the products from the passage through thespaces between the directing members in a generally horizontal direction, and tubular means positioned in said chamber at a higher level than said impingement member and above and in substantial vertical alignment with that portion of the spaces between said point and outer extremity the combustion chamher having a gas outlet opening positioned be- 'yond the tubular means in the direction of flow 'of the gases of combustion from the burner whereby the gases flow from said portion of the spaces between said point and outer extremity to said gas outlet opening in a generally vertical direction and in heat exchange relationship with said tubular means.

5. A furnace comprising a setting with a combustion chamber therein, burner means positioned adjacent the bottom of the combustion chamber and so as to direct a stream of prod ucts of combustion substantially vertically upwardly into said chamber, a plurality of spaced directing members arranged around the burner means so as to form a passage for said stream extending substantially parallel thereto and to provide spaces between adjacent members, the directing members and also the spaces therebetween extending from an inner extremity adjacent said passage to an outer extremity adjacent the inner periphery of the combustion chamber, an impingement member above the burner means and positioned in the path of flow of' said products flowing through the passage, said impingement member extending over the passage and said spaces to a point short of the outer extremity of the spaces thereby directing the products from the passage through the spaces between the directing members in a generally horizontaldirection, and a tubular coil of a diameter less than the transverse dimension of the combustion chamber, the coil being positioned in said chamber at a higher level than said impingement member and above the portion of the spaces between said point and outer extremity so that the tubular members thereof are in the path of flow of the products of combustion from said spaces, the combustion chamber having a gas outlet opening positioned to receive products of combustion after they flow over said tubular member of the coil.

6. A furnace comprising a setting with a combustion chamber therein, burner means positioned at the bottom of the chamber and so as to direct a stream of products of combustion substantially vertically upwardly into said chamber, a plurality of spaced directing members arranged around the burner means so as to form a passage for said stream of products extending substantially parallel thereto and to provide spaces between adjacent members, the directing members and also the spaces therebetween extending from an inner extremity adjacent said passage to an outer extremity adjacent the inner periphery of the combustion chamber, an impingement member above the burner means and positioned in the path of flow of said products flowing through the passage, said impingement member extending over the passage and said spaces to a point short of the outer extremity of the spaces thereby directing the products from the passage through the spaces between the directing members in a generally horizontal direction, and tubular means positioned in said chamber at a higher level than said impingement member and above and in substantial vertical alignment with that portion of the spaces between said point and outer extremity, the combustion chamber having a gas outlet opening above the tubular means and positioned in substantial vertical alignment with said burner whereby the gases flow from the portionof the spaces outwardly of said section thereof to said gas outlet opening in a generally vertical direction and in heat exchange relationship with said tubular means.

7 A furnace comprising a setting with a cylindricallyshaped combustion chamber therein, burner means positioned substantially centrally of the chamber at the bottom thereof to direct a stream of products of combustion upwardly and axially of the chamber, a plurality of vertically extending gas directing members arranged around said burner means to form a vertically extendinggas passage for the products of combustion therefrom, said directing members projecting radially outwardly from the passage and being spaced from one another to form gas spaces between adjacent members which spaces extend parallel to and radially outwardly from said passage from an inner extremity adjacent said passage to an outer extremity adjacent the inner periphery of the combustion chamber, a cylindrical tubular coil of a diameter less than the inside diameter of the combustion chamber, the coil being disposed in the. chamber so that the longitudinal axis thereof extends axially of the chamber, and an impingement member positioned in the combustion chamber at a level lower than said coil and above the burner means and extending transversely of the path of flow of said products of combustion flowing through the passage, the impingement member being of a transverse dimension less than the diameter of the coil and exteding over the passage and said spaces to a point short of the outer extremity of the spaces thereby directing the products of combustion from the passage through the spaces between the directin members in a generally horizontal direction, the directing members and also the spaces therebetween being disposed in the combustion chamber beneath said coil and extending from an inner extremity adjacent said passage to an outer extremity adjacent the inner periphery of the combustion chamber, the combustion chamber having a gas outlet opening beyond the coil in the direction of flow of said stream of products and disposed substantially centrally of the coil whereby the gases flow from the portion of the spaces outwardly of said section thereof to said gas outlet opening in a gen erally vertical direction and in heat exchange relationship with said tubular coil.

8. A furnace comprising a setting with a cylindrically-shaped combustion chamber therein having a roof with a gas outlet opening disposed centrally thereof, burner means positioned substantially centrally of the chamber at the bottom thereof to direct a stream of gases of combustion upwardly toward the gas outlet opening, a plurality of vertically extending gas directing members arranged around said burner means to form a vertically extending gas passage for the products of combustion therefrom, said directing members projecting radially outwardly from the passage and being spaced from one another to form gas spaces between adjacent members which spaces extend parallel to and radially outwardly from said passage from an inner extremity adjacent said passage to an outer extremity adjacent the inner periphery of the combustion chamber, the directing members being tapered so that the spaces therebetween are wider adjacent the periphery of the chamber than adjacent said stream of gases, a cylindrical tubular coil of a diameter less than the inside diameter of the furnace chamber positioned therein so that the longitudinal axis thereof extends axially of the chamber, said coil being disposed above the directing members and below said gas outlet opening, and an impingement member positioned in the combustion chamber at 'a level lower than said coil and above the burner means and extending transversely of the path of flow of said gases of combustion flowing through the passage, the impingement member being of a transverse dimension slightly less than the'diameter of the I coil and extending over the passage and said spaces to a point short of the outer extremity of the spaces thereby directing the gases from the passage to flow in a substantially horizontal direction through the spaces between the directing members thereafter to pass from the portion of the spaces outwardly of said section thereof to said gas outlet opening in a generally vertical direction and in heat exchange relationship with the coil adjacent the periphery thereof.

9. A furnace comprising a setting with a cylindrically shaped combustion chamber therein having a gas outlet opening disposed substantially centrally of the upper part thereof, burner means positioned at the bottom of the chamber and substantially centrally thereof to direct a stream of gases of combustion axially upwardly of the chamber, a plurality of vertically extenddirecting members each comprising a plurality of tiles of refractory material, said tiles being positioned one on top of the other, said directing members being so disposed as to encircle the burner means and form a passage substantially '8 parallel to the stream of gases, the directing members projectin radially outwardly from the passage from an inner extremity adjacent said passage to an outer extremity adjacent the inner periphery of the combustion chamber and being spaced from one another to form gas spaces between adjacent members which spaces extend parallel to and radially outwardly from said passage, said members being tapered so that the spaces therebetween are wider adjacent the periphery of the chamber than adjacent the stream of gases, a cylindrical tubular coil of a diameter less than the inside diameter of the furnace chamber positioned therein so that the longitudinal axis thereof extends axially of the chamber, said coil being disposed above the directing members, and an impingement member positioned in the combustion chamber at a level lower than said coil and above the burner means and extending transversely of the path of flow of said gases of combustion flowin through the passage, the impingement member being of a transverse dimension slightly less than the diam- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,806,858 Livingston May 26, 1931 1,989,400 Cameron et al Jan. 29, 1935 Barnes Jan. 27, 1942 

